including tuberculosis. serious, sometimes fatal events, such as infections, lymphoma, or other types of cancer, have happened. blood, liver and nervous system problems, serious allergic reactions, and new or worsening heart failure have occurred. before starting humira, your doctor should test you for tb. ask your doctor if you live in or have been to a region where certain fungal infections are common. tell your doctor if you have had tb, hepatitis b, are prone to infections or have symptoms such as fever, fatigue, cough, or sores. you should not start humira if you have any kind of infection. ask your rheumatologist about humira, to help relieve pain and stop further joint damage before they stop you.